99Problems

I've never encountered this glitch but I've encountered something similar randomly when playing career mode it would block me from placing or moving parts in the rocket/plane builders I can still use menu features like launch the rocket or save the game but it won't let me move or place till I quit and start the game and its always random in my experience it happens every 1 to 6 trips to the rocket/plane builders it gets really annoying but its not that bad compared to your problem